I've been with Vaya for almost 2 years but they just jacked the prices on existing customers. I was paying $11/month but under the new scheme I can either choose $20.90/month (per KB data counting) or $18/month (per MB data counting).
I'd barely use 30 minutes of voice a month, maybe 30 SMS. For me the most important thing is the data of 1 to 1.5GB/month.
Anyone recommend a better plan/carrier?
From what I have seen the data tends to reduce along with the call allowance, so you might find a cheaper plan but with maybe only around 300MB. I don't know if you will find anything with 1.5GB and low calls for less than what Vaya is offering. I'm on the vaya $18 plan which I am pretty happy with. I use little of the call allowance and around half the data.